Unitech PT-500 - Manual (Page 17)

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(This example is for units with 1024KB RAM memory. Units
with 128, 256, or 512 KB memory will display messages
appropriate for their respective memory size.)
Hold the power on/off key down for at least 3 seconds. The
PT-500 will shut down. Release the power on/off key and
press it again to power on. You should see the display
return to the Ready Mode.
Under the Ready Mode, your keypad input will be displayed
and sent out through the RS232 port. You can use [BkSp],
[Del], and 2 arrow keys to do simple data editing. You can
also scan barcode labels, and the decoded label will be
displayed and sent out through the RS232 port.
If there is no input activity for more than 3 minutes, the
default setting of the auto power off function will shut the PT-
500 off automatically to conserve power. To turn this
feature off, or to increase/decrease the time delay for auto
power off, please refer to the System Mode section to
change the system settings.
Default Settings for the Function Keys under Ready Mode
are as follows:
[F1] to enter INPUT Prompt
[F2] to enter CODE MENU
[F3] to enter COMM MENU
[F4] to enter MISC MENU
The purpose of the Function Keys is to provide shortcuts to
access system functions and settings. Please refer to the
System Mode section for the definition of Function Keys
settings.